Electric-resistance thermometers are used in connection with the
respiration calorimeter for several purposes: first, to determine the
fluctuations in the temperature of the air inside the chamber; second,
to measure the fluctuations of the temperature of the copper wall of the
respiration chamber; third, for determining the variations in body
temperature; finally, for recording the differences in temperature of
the incoming and outgoing water. While these thermometers are all built
on the same principle, their installation is very different, and a word
regarding the method of using each is necessary.